School of Environment, Resources and Development, Asian Institute of Technology, Pathumthani, 12120 Bangkok, Thailand.
Waste Manag. 2010 Dec;30(12):2608-14. doi: 10.1016/j.wasman.2010.08.006. Epub 2010 Sep 9.
Three pilot scale lysimeters were adopted to evaluate the stability pattern and leaching potential of heavy metals from MSW landfills under the E-waste co-disposed condition. One lysimeter served as control and solely filled with MSW, whereas the other two lysimeters were provided with 10% and 25% of E-waste scraps (% by weight), respectively. The reactors were monitored over a period of 280 days at ambient settings with continuous leachate recirculation. Stabilization pattern of carbon appears to be more than 50% in all the three lysimeters with irrespective of their operating conditions. Iron and zinc concentrations were high in leachate during bioreactor landfill operation and correlating with the TCLP leachability test results. In contrast, Pb concentration was around <0.6 mg/L, but which showed maximum leaching potential under TCLP test conditions. But, no heavy metal accumulation was found with leachate recirculation practices in lysimeters. Mobility of the metal content from the E-waste was found to be amplified with the long term disposal or stabilization within landfills. The results showed that the TCLP test cannot be completely reliable tool for measuring long-term leachability of toxic substances under landfill condition; rather landfill lysimeter studies are necessary to get the real scenario.
采用三个中试规模的渗滤池来评估在电子废物混合处置条件下，垃圾填埋场中重金属的稳定模式和浸出潜力。一个渗滤池作为对照，仅填充垃圾；而另外两个渗滤池分别填充 10%和 25%的电子废物碎片（按重量计）。在环境条件下，用连续的渗滤液再循环对反应堆进行了 280 天的监测。在所有三个渗滤池中，碳的稳定模式似乎都超过了 50%，而不管其操作条件如何。在生物反应器填埋作业期间，铁和锌的浓度在渗滤液中较高，与TCLP 浸出性测试结果相关。相比之下，Pb 浓度约为<0.6mg/L，但在 TCLP 测试条件下显示出最大的浸出潜力。但是，在渗滤池中的渗滤液再循环实践中没有发现重金属的积累。从电子废物中金属含量的迁移性随着在垃圾填埋场中的长期处置或稳定而放大。结果表明，TCLP 测试不能完全可靠地用于测量填埋条件下有毒物质的长期浸出性；而是需要进行填埋场渗滤池研究以获得真实情况。
